1 files changed, 149 insertions, 0 deletions
diff --git a/src/base/abci/abcClpBdd.c b/src/base/abci/abcClpBdd.c
new file mode 100644
index 00000000..59c76e09
--- /dev/null
+++ b/src/base/abci/abcClpBdd.c
@@ -0,0 +1,149 @@
+/**CFile****************************************************************
+
+  FileName    [abcCollapse.c]
+
+  SystemName  [ABC: Logic synthesis and verification system.]
+
+  PackageName [Network and node package.]
+
+  Synopsis    [Collapsing the network into two-levels.]
+
+  Author      [Alan Mishchenko]
+  
+  Affiliation [UC Berkeley]
+
+  Date        [Ver. 1.0. Started - June 20, 2005.]
+
+  Revision    [$Id: abcCollapse.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
+
+***********************************************************************/
+
+#include "abc.h"
+
+////////////////////////////////////////////////////////////////////////
+///                        DECLARATIONS                              ///
+////////////////////////////////////////////////////////////////////////
+
+static Abc_Ntk_t * Abc_NtkFromGlobalBdds( Abc_Ntk_t * pNtk );
+static Abc_Obj_t * Abc_NodeFromGlobalBdds( Abc_Ntk_t * pNtkNew, DdManager * dd, DdNode * bFunc );
+
+////////////////////////////////////////////////////////////////////////
+///                     FUNCTION DEFINITIONS                         ///
+////////////////////////////////////////////////////////////////////////
+
+/**Function*************************************************************
+
+  Synopsis    [Collapses the network.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Abc_Ntk_t * Abc_NtkCollapse( Abc_Ntk_t * pNtk, int fVerbose )
+{
+    Abc_Ntk_t * pNtkNew;
+
+    assert( Abc_NtkIsStrash(pNtk) );
+
+    // compute the global BDDs
+    if ( Abc_NtkGlobalBdds(pNtk, 0) == NULL )
+        return NULL;
+    if ( fVerbose )
+        printf( "The shared BDD size is %d nodes.\n", Cudd_ReadKeys(pNtk->pManGlob) - Cudd_ReadDead(pNtk->pManGlob) );
+
+    // create the new network
+    pNtkNew = Abc_NtkFromGlobalBdds( pNtk );
+    Abc_NtkFreeGlobalBdds( pNtk );
+    if ( pNtkNew == NULL )
+    {
+        Cudd_Quit( pNtk->pManGlob );
+        pNtk->pManGlob = NULL;
+        return NULL;
+    }
+    Extra_StopManager( pNtk->pManGlob );
+    pNtk->pManGlob = NULL;
+
+    // make the network minimum base
+    Abc_NtkMinimumBase( pNtkNew );
+
+    if ( pNtk->pExdc )
+        pNtkNew->pExdc = Abc_NtkDup( pNtk->pExdc );
+
+    // make sure that everything is okay
+    if ( !Abc_NtkCheck( pNtkNew ) )
+    {
+        printf( "Abc_NtkCollapse: The network check has failed.\n" );
+        Abc_NtkDelete( pNtkNew );
+        return NULL;
+    }
+    return pNtkNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Derives the network with the given global BDD.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Abc_Ntk_t * Abc_NtkFromGlobalBdds( Abc_Ntk_t * pNtk )
+{
+    ProgressBar * pProgress;
+    Abc_Ntk_t * pNtkNew;
+    Abc_Obj_t * pNode, * pNodeNew;
+    DdManager * dd = pNtk->pManGlob;
+    int i;
+    // start the new network
+    pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_BDD );
+    // make sure the new manager has the same number of inputs
+    Cudd_bddIthVar( pNtkNew->pManFunc, dd->size-1 );
+    // process the POs
+    pProgress = Extra_ProgressBarStart( stdout, Abc_NtkCoNum(pNtk) );
+    Abc_NtkForEachCo( pNtk, pNode, i )
+    {
+        Extra_ProgressBarUpdate( pProgress, i, NULL );
+        pNodeNew = Abc_NodeFromGlobalBdds( pNtkNew, dd, Vec_PtrEntry(pNtk->vFuncsGlob, i) );
+        Abc_ObjAddFanin( pNode->pCopy, pNodeNew );
+    }
+    Extra_ProgressBarStop( pProgress );
+    return pNtkNew;
+}
+
+/**Function*************************************************************
+
+  Synopsis    [Derives the network with the given global BDD.]
+
+  Description []
+               
+  SideEffects []
+
+  SeeAlso     []
+
+***********************************************************************/
+Abc_Obj_t * Abc_NodeFromGlobalBdds( Abc_Ntk_t * pNtkNew, DdManager * dd, DdNode * bFunc )
+{
+    Abc_Obj_t * pNodeNew, * pTemp;
+    int i;
+    // create a new node
+    pNodeNew = Abc_NtkCreateNode( pNtkNew );
+    // add the fanins in the order, in which they appear in the reordered manager
+    Abc_NtkForEachCi( pNtkNew, pTemp, i )
+        Abc_ObjAddFanin( pNodeNew, Abc_NtkCi(pNtkNew, dd->invperm[i]) );
+    // transfer the function
+    pNodeNew->pData = Extra_TransferLevelByLevel( dd, pNtkNew->pManFunc, bFunc );  Cudd_Ref( pNodeNew->pData );
+    return pNodeNew;
+}
+
+
+////////////////////////////////////////////////////////////////////////
+///                       END OF FILE                                ///
+////////////////////////////////////////////////////////////////////////
+
+